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(11) | EP 0 130 381 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Mechanism for implementing one machine cycle executable branch-on-any-bit-in-any-register instructions in a primitive instruction set computing system |
(57) A mechanism for fully executing a branch-on-any-bit-in-any-register instruction within
one machine cycle of the host computing system. The invention has particular utility
in a primitive instruction set computing system wherein a majority of its primitive
instruction set is executable within such a single machine cycle. Means are provided
whereby a branch decision may be made not only on a specified bit in the condition
register, but on any bit in any of the general purpose registers (30) provided in
the system CPU. Means are also provided for saving a given configuration of the condition
register in the general purpose registers for later use in subsequent branch-on-bit
operations. |